Gaya APA

Ledbetter, W, B., Peurifoy, R, L. (1985). Construction planning, equipment and methods / Robert L. Peurifoy, William B. Ledbetter (Ed.ke-4). : McGraw-Hill.

Gaya MLA

Ledbetter, William, B.., Peurifoy, Robert, L.. "Construction planning, equipment and methods / Robert L. Peurifoy, William B. Ledbetter". Ed.ke-4 : McGraw-Hill, 1985. Textbook.